Need Help!- Problem with ATC of Tape Drill FANUC 6MB

[david_chen]

Hello all,
I am new to this forum. I just get a FANUC Tape Drill Model D(FANUC 6MB),when I operate it for the fist time everything OK but after some days the ATC can't work but XYZ axis and the spindle are still working normally,I've check all proximity & limit switch of the ATC and the position coder,they are in good working condition.
I wonder if the PC card go wrong but ...I can't find the PC card plug on the master board.
Is there another PC on the controller???
How can I read the ladder to see if it has to change some parameters to fix it ?I need the maintenance manual of Fanuc Tape Driil Model D
Can any experts on Fanuc controller of this forum help me ?I will appreciate your help
Thanks and waiting for help

[Dan Fritz]

The system 6M and 6M-B can have one of two types of Programmable Controllers. The PC Model "A" is just a couple of extra EPROM chips on board labeled "PC/Puncher" (6M) or on the ROM board (6M-B). The PC Model A shares the main CPU of the control, and performs all the I/O ladder logic. There is also a PC Model "B", which uses it's own board and processor. On a 6M-B, the sockets for the accessory boards are labeled (right to left) as CABM (bubble memory board), CAH (additional axis control), CAC (CRT control and RS232), CAB (ROM card for executive EPROMs and PC model A EPROMS), and CAS (PC model B board). There is one more spot to mount a board for the resolver/inductosyn servo interface.

Unfortunately, the ladder is not visible on the system 6. You'll need one of the (rather expensive) PC programmers from Fanuc to be able to see or edit the ladder. You can, however, see the status of all the I/O and the internal flags using the Diagnostics page. Fanuc should have supplied a hard-copy printout of the ladder logic for your refrence. If you don't have a copy of the ladder, mabe another forum member with the same model machine can loan you a copy.

The ladder is very unlikely to be the cause of your tool changer problem. The ladder logic is burned into EPROMs, and is not going to behave differently from day to day. Your problem is most likely to be a bad limit switch or sensor on the tool changer, or possibly a bad reed relay on the Fanuc I/O board.

What happens when the tool changer malfunctions? Does the control get "stuck" with the "in-cycle" light on?

[david_chen]

Originally Posted by Dan Fritz The system 6M and 6M-B can have one of two types of Programmable Controllers. The PC Model "A" is just a couple of extra EPROM chips on board labeled "PC/Puncher" (6M) or on the ROM board (6M-B). The PC Model A shares the main CPU of the control, and performs all the I/O ladder logic. There is also a PC Model "B", which uses it's own board and processor. On a 6M-B, the sockets for the accessory boards are labeled (right to left) as CABM (bubble memory board), CAH (additional axis control), CAC (CRT control and RS232), CAB (ROM card for executive EPROMs and PC model A EPROMS), and CAS (PC model B board). There is one more spot to mount a board for the resolver/inductosyn servo interface. Unfortunately, the ladder is not visible on the system 6. You'll need one of the (rather expensive) PC programmers from Fanuc to be able to see or edit the ladder. You can, however, see the status of all the I/O and the internal flags using the Diagnostics page. Fanuc should have supplied a hard-copy printout of the ladder logic for your refrence. If you don't have a copy of the ladder, mabe another forum member with the same model machine can loan you a copy. The ladder is very unlikely to be the cause of your tool changer problem. The ladder logic is burned into EPROMs, and is not going to behave differently from day to day. Your problem is most likely to be a bad limit switch or sensor on the tool changer, or possibly a bad reed relay on the Fanuc I/O board. What happens when the tool changer malfunctions? Does the control get "stuck" with the "in-cycle" light on?

Many,many thanks to Dan Fritz for your reply.

.When I do ATC ,the control get "stuck" in cycle start lamp ON.
.I 've check all limit switchs on the ATC by VOM and by Diagnostic screen ,they are working normally.I also checked the position coder of the ATC by oscilloscope ,it's good too
.I also replaced 2 connection units(I/O board) but nothing happens
.Unfortunately,I don't have the copy of ladder diagram,Can any one on the forum send me a copy? The machine's maker: FANUC, Model: Tape Drill Model D, Controller:FANUC 6MB
.I think I have to edit some counter in the ladder to fix this ATC problem as I used to do with Fanuc 6M equipped with PC model B board
One question:
In the case I don't have the ladder logic diagram,is there other way to see the ladder ? I have seen on our forum many posts of f-bu and Jung members,who can edit and print the ladder of Fanuc OM in pdf format .In the case FANUC 6MB is it can ?Can f-bu or Jung helping me please?
I am waiting for more help
Thanks
Chen

[stevo1]

Does your machine use a macro program to do the tool change or does the tool change operate through the ladder? If it does operate with a macro can you post the tool change program and were exactly it stops.

I agree with Fritz that this is probably not going to be a ladder problem as this cannot change from one day to the next. I have come across little things that can hang up a tool change and are not common to all machines. I had one not tool change if there was a number in the wear offset page. Is your spindle properly orientated??

Stevo

[david_chen]

Originally Posted by stevo1 Does your machine use a macro program to do the tool change or does the tool change operate through the ladder? If it does operate with a macro can you post the tool change program and were exactly it stops. I agree with Fritz that this is probably not going to be a ladder problem as this cannot change from one day to the next. I have come across little things that can hang up a tool change and are not common to all machines. I had one not tool change if there was a number in the wear offset page. Is your spindle properly orientated?? Stevo

Hi Stevo,
This machine operate the tool change through the ladder,not use a macro program, it has PC model A (4 ROM 2716) on ROM board.
When run the tool changer, the spindle orientated and get "stuck" while the cycle start lamp on, I think the problem now is how to read (and print out) the ladder from 4 ROM 2716 to see if there are a counter does not coincide with tool number as I usually do when I fix the same ATC problem on Fanuc OM
Thanks
Chen

[david_chen]

I am waiting for more help, please
Thanks
Chen